I have an iphone 3gs and i use it for a few months now after jailbraking it with pwnage. I have no problems but i need to install software that needs 4.2 +, i have firmware 4.0. Does anybody know if i update the firmware to 4.3.5 will i loose all my applications that i have installed with ********? Can somebody help and tell me if i need to follow some procedure not to loose my data?